[IPV6]: ROUTE: Add accept_ra_defrtr sysctl.

[net-next-2.6.git] / net / ipv6 / ndisc.c

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index cb8856b1d9518ba251f43fbb5b4ab64ba2bed6da..e1711679605960ae63898e0f3ebf86b553201298 100644 (file)
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1019,7 +1019,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
         struct ra_msg *ra_msg = (struct ra_msg *) skb->h.raw;
        struct neighbour *neigh = NULL;
        struct inet6_dev *in6_dev;
-       struct rt6_info *rt;
+       struct rt6_info *rt = NULL;
        int lifetime;
        struct ndisc_options ndopts;
        int optlen;
@@ -1081,6 +1081,9 @@ static void ndisc_router_discovery(struct sk_buff *skb)
                                (ra_msg->icmph.icmp6_addrconf_other ?
                                        IF_RA_OTHERCONF : 0);
 
+       if (!in6_dev->cnf.accept_ra_defrtr)
+               goto skip_defrtr;
+
        lifetime = ntohs(ra_msg->icmph.icmp6_rt_lifetime);
 
        rt = rt6_get_dflt_router(&skb->nh.ipv6h->saddr, skb->dev);
@@ -1128,6 +1131,8 @@ static void ndisc_router_discovery(struct sk_buff *skb)
                        rt->u.dst.metrics[RTAX_HOPLIMIT-1] = ra_msg->icmph.icmp6_hop_limit;
        }
 
+skip_defrtr:
+
        /*
         *      Update Reachable Time and Retrans Timer
         */